Explore popular diseases in clinical trials

Check which popular diseases are currently being frequently studied.

See also our rare diseases glossary and drug database.

Starting by letter

To open the diseases glossary, select a letter from the list below.

Most popular diseases

The list below features the most popular diseases currently involved in ongoing clinical trials.

Disease Trials
Non-small cell lung cancer 257
Breast cancer 130
Neoplasm 124
Plasma cell myeloma 124
Acute myeloid leukaemia 103
Neoplasm malignant 102
Colitis ulcerative 93
Prostate cancer 91
Colorectal cancer metastatic 84
Obesity 84
Colorectal cancer 76
Crohn’s disease 76
Ovarian cancer 76
Dementia Alzheimer’s type 74
Hepatocellular carcinoma 73
Malignant melanoma 69
Breast cancer metastatic 68
Type 2 diabetes mellitus 67
Dermatitis atopic 65
Triple negative breast cancer 62
Chronic lymphocytic leukaemia 62
Squamous cell carcinoma of head and neck 60
HIV infection 58
Rheumatoid arthritis 58
Asthma 57
Non-small cell lung cancer metastatic 57
Osteoarthritis 56
Hormone receptor positive HER2 negative breast cancer 54
Pancreatic carcinoma 51
Renal transplant 51
Chronic kidney disease 50
Multiple sclerosis 48
Parkinson’s disease 46
Chronic obstructive pulmonary disease 46
Systemic lupus erythematosus 46
Hormone-refractory prostate cancer 46
Ischaemic stroke 46
Atrial fibrillation 44
Gastric cancer 42
Bladder cancer 42
Non-small cell lung cancer stage IV 41
Diffuse large B-cell lymphoma 41
Psoriasis 41
Migraine 41
Oesophageal adenocarcinoma 40
Major depression 38
Myelodysplastic syndrome 38
Transitional cell carcinoma 38
Glioblastoma 38
Psoriatic arthropathy 38
Endometrial cancer 37
Prostate cancer metastatic 37
Overweight 36
Cardiac failure 35
Acute lymphocytic leukaemia 35
Cholangiocarcinoma 35
COVID-19 34
Hormone receptor positive breast cancer 34
Systemic scleroderma 34
Hidradenitis 33
HER2 positive breast cancer 33
Type 1 diabetes mellitus 33
Renal cell carcinoma 32
Head and neck cancer 32
Plasma cell myeloma refractory 32
Schizophrenia 32
Myasthenia gravis 32
Coronary artery disease 31
Adenocarcinoma pancreas 31
Rectal cancer 30
Cervix carcinoma 30
Follicular lymphoma 30
Pulmonary arterial hypertension 29
Pancreatic carcinoma metastatic 29
Depression 29
Idiopathic pulmonary fibrosis 28
Bladder transitional cell carcinoma 27
Small cell lung cancer extensive stage 27
Oesophageal carcinoma 27
Metastatic malignant melanoma 26
Interstitial lung disease 26
B-cell lymphoma 25
Fallopian tube cancer 25
Pneumonia 25
Adenocarcinoma gastric 25
Lung neoplasm malignant 25
Non-small cell lung cancer stage III 25
Procedural pain 24
Soft tissue sarcoma 24
Myelofibrosis 24
Small cell lung cancer 24
Amyotrophic lateral sclerosis 24
Endocrine ophthalmopathy 24
Acute myocardial infarction 24
B-cell small lymphocytic lymphoma 23
Conjunctivitis allergic 23
Sepsis 23
Colon cancer 23
Sjogren’s syndrome 23
Breast cancer female 22

Diseases starting with i

  • 7

    Iron deficiency

    Iron deficiency is one of the most common nutritional problems worldwide, affecting about one-third of the global population. When your body doesn’t have enough iron, it can’t produce adequate amounts of healthy red blood cells, leaving you feeling tired, weak, and short of breath.

  • 4

    Iron deficiency anaemia

    Iron deficiency anaemia is the most common type of anaemia worldwide, affecting millions of people when their bodies lack enough iron to produce healthy red blood cells that carry oxygen throughout the body.

  • 2

    Iron overload

    When the body stores too much iron, it can damage vital organs over time. Though often inherited, iron overload is treatable if caught early, helping prevent serious complications affecting the heart, liver, and other organs.

  • 6

    Irritable bowel syndrome

    Irritable bowel syndrome affects millions of people worldwide, causing uncomfortable digestive symptoms that can disrupt daily life. While there is no cure, understanding the condition and learning to manage it effectively can help you live a full and normal life.

  • 1

    Ischaemic skin ulcer

    Ischaemic skin ulcers are painful, slow-healing wounds that develop when tissues do not receive enough blood, oxygen, and nutrients due to narrowed or blocked arteries, most commonly affecting the feet and legs.

  • 46

    Ischaemic stroke

    Ischaemic stroke is a life-threatening emergency that occurs when blood flow to part of the brain is blocked, most commonly by a blood clot. It is the most common type of stroke, accounting for about 87% of all cases. Every second counts—recognizing the warning signs and getting immediate treatment can be the difference between recovery and permanent disability or death.

  • 1

    Isodicentric chromosome 15 syndrome

    Isodicentric chromosome 15 syndrome is a rare genetic condition caused by extra genetic material from chromosome 15, leading to challenges with development, learning, and sometimes seizures.